#include<stdio.h>
int main()
{
	double x,y;
	printf("Enter x(x>=0):\n");
	scanf("%lf",&x);
	if(x<=20){
		y=4*x/3;
	}
	else{
		y=5*x-3;
	}
	printf("%.1lf   %.3lf\n",x,y);
	return 0;
}